US1953431A - Flotation process for nonsulphide ore - Google Patents
Flotation process for nonsulphide ore Download PDFInfo
- Publication number
- US1953431A US1953431A US564974A US56497431A US1953431A US 1953431 A US1953431 A US 1953431A US 564974 A US564974 A US 564974A US 56497431 A US56497431 A US 56497431A US 1953431 A US1953431 A US 1953431A
- Authority
- US
- United States
- Prior art keywords
- ore
- metals
- flotation
- gel
- silicate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title description 13
- 238000005188 flotation Methods 0.000 title description 10
- 229910052751 metal Inorganic materials 0.000 description 17
- 239000002184 metal Substances 0.000 description 16
- 229910052500 inorganic mineral Inorganic materials 0.000 description 14
- 239000011707 mineral Substances 0.000 description 14
- 150000002739 metals Chemical class 0.000 description 13
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 10
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 150000001342 alkaline earth metals Chemical class 0.000 description 4
- 239000008396 flotation agent Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- IUMKBGOLDBCDFK-UHFFFAOYSA-N dialuminum;dicalcium;iron(2+);trisilicate;hydrate Chemical compound O.[Al+3].[Al+3].[Ca+2].[Ca+2].[Fe+2].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IUMKBGOLDBCDFK-UHFFFAOYSA-N 0.000 description 3
- 229910052869 epidote Inorganic materials 0.000 description 3
- 150000002736 metal compounds Chemical class 0.000 description 3
- 229910052914 metal silicate Inorganic materials 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910052613 tourmaline Inorganic materials 0.000 description 3
- 239000011032 tourmaline Substances 0.000 description 3
- 229940070527 tourmaline Drugs 0.000 description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- 239000005642 Oleic acid Substances 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical group [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- 229910001388 sodium aluminate Inorganic materials 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- 229910052915 alkaline earth metal silicate Inorganic materials 0.000 description 1
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- ZXOKVTWPEIAYAB-UHFFFAOYSA-N dioxido(oxo)tungsten Chemical compound [O-][W]([O-])=O ZXOKVTWPEIAYAB-UHFFFAOYSA-N 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000010665 pine oil Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 229940116411 terpineol Drugs 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/008—Organic compounds containing oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/002—Inorganic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
Definitions
- Patented Apr. 3, 1934 UNITED STATES 1,953,431 FLOTATION raoccss FOR NONSULPHIDE can 7 John M. Patek, Milwaukee, Wis.
- This invention relates to the concentration of non-sulphide ore minerals by flotation methods, especially in connection with the usual method of using a saponiflable substance as the principal 5 flotation agent, and is particularly adapted to the concentration of ores composed of oxides, silicates and other non-sulphide minerals, such as the oxide ores of tin and tungsten.
- the concentrated ore contains 2 large quantities of gangue minerals which are not separable.
- a natural material which contains the mineral oxide of a valuable element in small concentrations may at the same time contain large concentrations of quartz,
- soluble silicate is used only to form an insoluble metal silicate gel which may be selectively adsorbed upon the surfaces of the silicate gangue minerals.
- a moderate excess of the gel in system is unimportant for this reason.
- unimportant is the source of the gel.
- a soluble silicate may be first reduced to silicic acid by adding strong acid and a soluble metal compound solution, such as lime water added to form the gel, which may then be introduced to the flota- .tion machine.
- a soluble metal compound solution such as lime water added to form the gel, which may then be introduced to the flota- .tion machine.
- Many of the non-sulphide ore minerals bear a very weak surface attraction in contrast to the strong surface atraction of the gangue silicates. The ore minerals, consequently, do not adsorb the gel substance, and are, therefore, easily floated by active flotation agents.
- the metal compounds added to the flotation circuit do not include all metals, but only metals of a specific class.
- This class includes metals which have a certain definite characteristic in common, namely, the ability to form a. soluble oxide or hydroxide in an alkaline solution.
- Metals which form such soluble oxides or hydroxides in an alkaline solution will henceforth be referred to as soluble oxide forming metals. They are of two types:
- Amphoteric metals 2.-Alkaline earth metals
- Amphoteric metals may be sharply difleren tiated from all other metals, because amphoteric metals are the only metals that combine with oxygen to form chemical radicles which behave as anions.
- The'type of compound in which the amphoteric metals are introduced into the flotation circuit is the alkaline compound of the metal oxide.
- An example is sodium aluminate.
- the second type of soluble oxide forming 95 metals are used as oxides or hydroxides.
- the principal alkaline earth metals are calcium, magnesium, strontium and barium. When compared to the amphoteric metals, their cost is so low that they find application where a low cost flotation agent is essential.
- I may take 2000 grams of wolframite ore, which has been ground and mixed with water to form a pulp. To the pulp I then add 3 grams of sodium aluminate and 5 grams of sodium silicate. The charge is then agitatedand' in the presence of 1.5 grams of oleic acid and 0.2 grams of pine oil, subjected to flotation in the usual manner.
- a more specific example is as follows: To 10 drops of sodium silicate in a test tube was added 2 0.0. of water and 1.5 0.0. of dilute sulfuric acid, followed by 2 0.0. of saturated calcium hydroxide solution. A clear, firm gel formed in the tube immediately.
- the gel was then added to a 50 gram flotation machine containing a partially concentrated cassiterite ore containing 26.5% tin.
- To the mixture was added water and the ore pulp was then agitated for several minutes followed by the addition of 0.5 lbs. per ton of oleic acid and 0.2 lbs. per ton of terpineol.
- Flotation was carried out in the usual manner and the. cassiterite recovered in the froth.
- the tailings contained 1.5% tin and the concentrate contained 47% tin, showing a recovery of 98% ofthe tin. l
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Description
Patented Apr. 3, 1934 UNITED STATES 1,953,431 FLOTATION raoccss FOR NONSULPHIDE can 7 John M. Patek, Milwaukee, Wis.
1% Drawing.
4 Claims.
This invention relates to the concentration of non-sulphide ore minerals by flotation methods, especially in connection with the usual method of using a saponiflable substance as the principal 5 flotation agent, and is particularly adapted to the concentration of ores composed of oxides, silicates and other non-sulphide minerals, such as the oxide ores of tin and tungsten.
It is well known that the usual method of employing a fatty acid to cause the concentration by flotation of oxide, silicate and other'non-sulphide ore minerals is of little practical use since the gangue minerals are floated almost as readily as the ore minerals and little or no separation isaccomplished.
Special methods of flotation which improve the recovery of non-sulphide ore from the gangueminerals have been proposed. At best, by these older methods, the concentrated ore contains 2 large quantities of gangue minerals which are not separable. For example, a natural material which contains the mineral oxide of a valuable element in small concentrations may at the same time contain large concentrations of quartz,
mica, tourmaline, epidote. The treatment of such a material by methods known prior to my invention results only in the separation of the quartz and mica leaving the concentrated material still contaminated with the epidote and tourmaline originally present. It is only under rare and peculiar circumstances that such a separation is of practical value, to-wit: when the original material is luckily free of such constituents as tourmaline, epidote, etc.
I have, on the other hand, discovered that many of the gangue minerals which formerly-were not" separable may now be separated by rendering them unsusceptible to the collecting action of even the most active flotation agents. This I 4 accomplish by contacting the mineral with a jellylike mixture formed by adding small amounts of a soluble silicate to a solution containing small amounts of certain compounds formed with the specific metallic elements hereinafter to be speci- 4 fied. The gangue mineral particle thus contacted will adsorb a coating of material, in the form of a metal silicate gel, formed by the interaction of the soluble silicate with the metal compound. This coating of metal silicate gel provides a positive resistance to the collecting action of the notation agent and the particle s0 coated will not float. The adsorption of the coating upon the gangue mineral particle depends upon the chemical nature of the surface of the particle itself.
The structure of the gel substance formed is of Application September 24, "1931,
Serial No. 564,974
the general form MO.SiO2(Hz0), wherein M represents the specific metal employed. Thus the soluble silicate is used only to form an insoluble metal silicate gel which may be selectively adsorbed upon the surfaces of the silicate gangue minerals. A moderate excess of the gel in system is unimportant for this reason. Likewise unimportant is the source of the gel. A soluble silicate may be first reduced to silicic acid by adding strong acid and a soluble metal compound solution, such as lime water added to form the gel, which may then be introduced to the flota- .tion machine. Many of the non-sulphide ore minerals bear a very weak surface attraction in contrast to the strong surface atraction of the gangue silicates. The ore minerals, consequently, do not adsorb the gel substance, and are, therefore, easily floated by active flotation agents. I
The metal compounds added to the flotation circuit do not include all metals, but only metals of a specific class. This class includes metals which have a certain definite characteristic in common, namely, the ability to form a. soluble oxide or hydroxide in an alkaline solution. Metals which form such soluble oxides or hydroxides in an alkaline solution will henceforth be referred to as soluble oxide forming metals. They are of two types:
1.Amphoteric metals 2.-Alkaline earth metals I Amphoteric metals may be sharply difleren tiated from all other metals, because amphoteric metals are the only metals that combine with oxygen to form chemical radicles which behave as anions. The'type of compound in which the amphoteric metals are introduced into the flotation circuit is the alkaline compound of the metal oxide. An example is sodium aluminate.
The second type of soluble oxide forming 95 metals, the alkaline earth metals, are used as oxides or hydroxides. The principal alkaline earth metals are calcium, magnesium, strontium and barium. When compared to the amphoteric metals, their cost is so low that they find application where a low cost flotation agent is essential.
' In my process the material to be treated is ground and mixed with water to form a pulp in the usual manner. To the pulp is then added a small amount of a compound containing a metal, let us say, of the type defined above as the alkaline earth metal type. To the pulp is also added an amount of soluble silicate slightly in excess of the added compound of the metal of the alka- 11o compounds are among those advantageously incorporated in this manner.
As a specific example of one manner of carrying on my invention, I may take 2000 grams of wolframite ore, which has been ground and mixed with water to form a pulp. To the pulp I then add 3 grams of sodium aluminate and 5 grams of sodium silicate. The charge is then agitatedand' in the presence of 1.5 grams of oleic acid and 0.2 grams of pine oil, subjected to flotation in the usual manner. A more specific example is as follows: To 10 drops of sodium silicate in a test tube was added 2 0.0. of water and 1.5 0.0. of dilute sulfuric acid, followed by 2 0.0. of saturated calcium hydroxide solution. A clear, firm gel formed in the tube immediately. The gel was then added to a 50 gram flotation machine containing a partially concentrated cassiterite ore containing 26.5% tin. To the mixture was added water and the ore pulp was then agitated for several minutes followed by the addition of 0.5 lbs. per ton of oleic acid and 0.2 lbs. per ton of terpineol. Flotation was carried out in the usual manner and the. cassiterite recovered in the froth. The tailings contained 1.5% tin and the concentrate contained 47% tin, showing a recovery of 98% ofthe tin. l
, While I have fully described above the process of my invention and have given particular directions for, the practice thereof, I wish it to be understood that I do not intend that the scope of the Letters Patent be limited thereby, but only to be limited by the range of the invention as set forth in the appended claims.
I c1aimas my invention:
1. The process of concentrating non-sulphide ores which consists in grinding the ore, mixing the same with water to form a pulp, adding the oxide of an alkaline earth metal, a soluble silicate and a saponifiable substance, agitating the mixture while supplying air thereto, and removing the froth produced thereby.
,2. The process of concentrating non-sulphide ores which consists in grinding the ore, mixing the same with water to form a pulp, adding an alkaline earth metal silicate gel, a saponifying substance and a frothing agent, agitating the mixture while supplying air thereto, and removing the froth produced thereby.
3. The process of concentrating non-sulphide ores which consists in grinding the ore, mixing the same with water to form a pulp, adding calcium hydroxide, a soluble silicate and a saponify-, ing substance, agitating the mixture while supplying air thereto, and removing the froth produced thereby. a
4. The process of concentrating non-sulphide ores which consists in, grinding the ore, mixing the same with water to form a pulp, adding an alkaline earth metal oxide and soluble silicate, so as to form a gel,.and a saponifiable substance, agitating the mixture while supplying air thereno to to form a froth, and removing the froth produced thereby.
JOHN M. PATEK.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US564974A US1953431A (en) | 1931-09-24 | 1931-09-24 | Flotation process for nonsulphide ore |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US564974A US1953431A (en) | 1931-09-24 | 1931-09-24 | Flotation process for nonsulphide ore |
Publications (1)
Publication Number | Publication Date |
---|---|
US1953431A true US1953431A (en) | 1934-04-03 |
Family
ID=24256681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US564974A Expired - Lifetime US1953431A (en) | 1931-09-24 | 1931-09-24 | Flotation process for nonsulphide ore |
Country Status (1)
Country | Link |
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US (1) | US1953431A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2471341A (en) * | 1945-12-20 | 1949-05-24 | American Cyanamid Co | Froth flotation of apatite using calcium silicate |
US2607479A (en) * | 1948-02-04 | 1952-08-19 | California Research Corp | Agglomerate tabling of tungsten bearing ores |
US3915391A (en) * | 1972-07-17 | 1975-10-28 | Engelhard Min & Chem | Recovery of scheelite from ores by flotation |
US4054442A (en) * | 1976-02-23 | 1977-10-18 | Union Carbide Corporation | Method for recovering scheelite from tungsten ores by flotation |
US4366050A (en) * | 1981-01-19 | 1982-12-28 | Amax Inc. | Scheelite flotation |
US5037534A (en) * | 1989-09-14 | 1991-08-06 | J. M. Huber Corporation | Flotation aid and process for removal of impurities from silicate minerals |
US5180511A (en) * | 1989-09-14 | 1993-01-19 | J.M. Huber Corporation | Flotation aid and process for removal of impurities from silicate minerals |
-
1931
- 1931-09-24 US US564974A patent/US1953431A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2471341A (en) * | 1945-12-20 | 1949-05-24 | American Cyanamid Co | Froth flotation of apatite using calcium silicate |
US2607479A (en) * | 1948-02-04 | 1952-08-19 | California Research Corp | Agglomerate tabling of tungsten bearing ores |
US3915391A (en) * | 1972-07-17 | 1975-10-28 | Engelhard Min & Chem | Recovery of scheelite from ores by flotation |
US4054442A (en) * | 1976-02-23 | 1977-10-18 | Union Carbide Corporation | Method for recovering scheelite from tungsten ores by flotation |
US4366050A (en) * | 1981-01-19 | 1982-12-28 | Amax Inc. | Scheelite flotation |
US5037534A (en) * | 1989-09-14 | 1991-08-06 | J. M. Huber Corporation | Flotation aid and process for removal of impurities from silicate minerals |
US5180511A (en) * | 1989-09-14 | 1993-01-19 | J.M. Huber Corporation | Flotation aid and process for removal of impurities from silicate minerals |
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